1987, I Ain't No Joke, by Eric B. and Rakim, on the album "Paid in Full": "Another enemy / Not even a frenemy."

2001, In France the Seine has all the advantages of Northernness (a quality underrated by our Gallic frenemy) but it is too fatally interested in Paris [...] —John Lanchester, The Debt to Pleasure.[1]

2004, You know when you dump a guy, only to discover years later that he's evolved into the perfect boyfriend—for the high-school frenemy who convinced you to dump him in the first place...? —The Ex-Factor, Andrea Semple. [back cover] [2]